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Climate change is altering the hydrology of Canadian rivers to an unprecedented degree. Consequently, sustainable freshwater management practices need to adapt, which include the development of integrated water resource strategies and environmental flow recommendations. A particular challenge arises for these assessments due to the highly diverse nature of river ecosystems across Canada. This diversity can be addressed by using a classification system to create manageable spatial units. Building upon and adapting the results of a global river reach classification scheme, we present a multidisciplinary K-means clustering approach to categorize all river reaches of Canada into 23 types at fine spatial resolution. The typology is based on classifier variables related to hydrology, mostly derived from modelled long-term means of monthly discharges, physiography, climate, and fluvial geomorphology. Resulting maps provide baseline information for rivers of all size classes, from small headwater streams to very large rivers, across the entire country, including unmonitored regions such as the High Arctic. The classification system also points to some strategic expansion opportunities for the current Canadian monitoring network of river gauging stations.

Canada will be unable to meet its greenhouse gas pledges—of reducing greenhouse gas emissions by 30% over 2005 levels by 2030—without transitioning away from the current high-carbon economy. This transition will bring new challenges, especially to the Canadian boreal zone. The boreal zone continues to experience intensive natural resource activities including the extraction of forest, mining, oil and gas, and renewable energy products, which in combination with climate change, is placing the future sustainability of the boreal zone at risk. We explored policy options to reduce the risk to the future sustainability of the boreal zone in light of the inevitable energy transition to either a higher or a lower dependence on carbon and the uncertainty of society’s capacity to adapt to change. Current policies are putting us on a path towards failure to achieve sustainability of the boreal zone. While current policies may be moving us towards a low-carbon future, they lack a shared vision of what the energy transition will be and engagement by those members of society most impacted; they are top-down, prescriptive, and fragmented, and they lack capacity, accountability, and enforcement. Together these limitations create barriers to society’s capacity to adapt to the low-carbon future. Sustainability of the boreal zone will not only require a transition to a low-carbon economy but will require policies that overcome these barriers and create a higher capacity for society to adapt.

The Canadian boreal zone provides extractive goods and services (provisioning ecosystem services (PrES)) to domestic and global markets and makes a significant contribution to the Canadian economy. The intensity and location of these extractive activities, however, may positively or negatively affect the availability of other benefits that the Canadian and global society receive from the boreal. Where PrES compete, managing these activities along with their impacts to boreal ecosystems becomes a balancing act between the need for resource extraction and the continued availability of the other benefits from ecosystems. Management measures and policies are more likely to succeed if they are designed with foresight, which means accounting for how demand, a key driver of change in the boreal, may change in the future. To help this process, we present three divergent, yet plausible future scenarios based on the analysis of: (i) the capacity of the boreal to provide wood products, fossil fuels, metals and minerals, and hydropower and other renewables; (ii) past trends (1985–2015) and key events in the demand for these PrES; (iii) the interaction of demand for PrES with other drivers of change to the boreal zone; and (iv) the synergies and trade-offs between PrES. We find that historically and currently the capacity of the boreal to provide these PrES exceeds the amount currently supplied. However, the capacity of different PrES and location of extractive activities are spatially dispersed creating a spatial and temporal patchwork of associated risks to local ecosystem integrity and the supply of non-PrES. In addition, these scenarios suggest that the future of boreal PrES is very uncertain and highly dependent on how other drivers of change (namely governance and geopolitics, societal values and climate change) play out in the future. Given the spatial complexity, we find that the cumulative effect of these drivers (e.g., climate change) will determine what paths unfold for different areas of the boreal, and we conclude that careful consideration and planning must be given to ensure that the balance between PrES and non-PrES is maintained.